Abstract:
Polyethers (A), whose main chain essentially consists of repeating units of the formulae (1) and (2) in alternating order, are useful as an additive to a porous polymer membrane, or as the main polymer constituent of a porous polymer membrane, for stabilizing said membrane against detrimental effects of oxidizing agents and/or for improving the stability of a filtration module comprising said membrane against detrimental effects of oxidizing agents.
Abstract:
An oxygen-scavenging composition containing (I) a polymeric resin, (II) an organic oxidation additive based on a cyclic oxyimide, (III) a metal salt, preferably a transition metal salt, (IV) a sacrificial oxidizable substrate, and optionally, (V) an additional component; wherein components (I) and (IV) are different.
Abstract:
An oxygen-scavenging composition containing (I) a polymeric resin, (II) an organic oxidation additive based on a cyclic oxyimide, (III) a metal salt, preferably a transition metal salt, (IV) a sacrificial oxidizable substrate, and optionally, (V) an additional component; wherein components (I) and (IV) are different.
Abstract:
Process for making a membrane M comprising the following steps: a) preparing a copolymer C, wherein said copolymer C comprises blocks of at least one polyarylene ether A and blocks of polyalkylene oxide PAO, wherein the content of polyethyleneoxide in copolymer C is 30 to 90% by weight and wherein copolymer C is prepared in a solvent L to yield solution S; b) providing a dope solution D comprising at least one polymer P; c) mixing solution S and dope solution D; d) preparing a membrane by bringing the mixture of solution S and dope solution D into contact with at least one coagulating agent.
Abstract:
The present invention relates to oxygen-substituted sterically hindered amines of the formulae I or II: (II), wherein, for example, F2, R3, R5, R6, R8, R9, R11, R12, R13, R14 are n-butyl: Z1 to Z10 are propoxy and R1, R4, R7, R10, R13 are 2,2,6,6-tetramethyl-1-propoxy-piperidin-4-yl. Compositions comprising compounds of formulae I or II and an organic material, which is susceptible to oxidative, thermal or light-induced degradation, are further disclosed. Optionally, further additives are contained.
Abstract:
Disclosed herein is a compound of the formula (I), wherein one or two radicals of the radicals R1 are independently of one another C1-C20alkyloxy or C3-C12cycloalkyloxy and the remaining radicals R1 are independently of one another hydrogen, C1-C20alkyl or C3-C12cycloalkyl; the radicals R0 and R2 are independently of one another hydrogen, C1-C20alkyl, C3-C12cycloalkyl or a group of the formula (II-a) with R3 being hydrogen, C1-C20alkyl, C3-C12cycloalkyl, C1-C20alkyloxy or C3-C12cycloalkyloxy; Y is C2-C12alkylene; m is 0 or 1; n is 1, 2 or 3; when n is 1, X is hydrogen, C1-C20alkyl, C3-C12cycloalkyl or a group of the formula (II-a); when n is 2, X is C2-C12alkylene; when n is 3, X is a group N(Z—)3 with Z being C2-C12alkyl.
Abstract:
The present invention relates to oxygen-substituted sterically hindered amines of the formulae I or II: (II), wherein, for example, F2, R3, R5, R6, R8, R9, R11, R12, R13, R14 are n-butyl: Z1 to Z10 are propoxy and R1, R4, R7, R10, R13 are 2,2,6,6-tetramethyl-1-propoxy-piperidin-4-yl. Compositions comprising compounds of formulae I or II and an organic material, which is susceptible to oxidative, thermal or light-induced degradation, are further disclosed. Optionally, further additives are contained.
Abstract:
An oxygen-scavenging composition containing (I) a polymeric resin, (II) an organic oxidation additive based on a cyclic oxyimide, (III) a metal salt, preferably a transition metal salt, (IV) a sacrificial oxidizable substrate, and optionally, (V) an additional component; wherein components (I) and (IV) are different.